This is a document called the Parado (ph) Chart, which parados from largest to smallest the occurrence rates. later, you'll see that we actually adjust this based on the number of tires produced to actually get to a parts-per-million kind of defect rate.

We stood about on parapets, and walked all over the place, stopping motionless now and again as a star shell went up, and moving on again just in time to hear a bullet or two whizz past behind and go "smack" into a tree in the hedge behind, or "plop" into the mud parados.